Filter-press.



PATENTED NOV. 26, 1907.

F. W. VON OVEN.

FILTER PRESS. APPLIOATION FILED APB. 26,1907.

3 SHEETS-SHEET 1.

No. 872,008. PATENTED NOV. 26, 1907.

P. .W. VON OVEN.

FILTER PRESS. APPLICATION FILED APR.28,1907.

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$55. WWY EE 3 1 hw mm mm %w m 0 I v x w a l allowing the feed-inlets to extend through FREDERICK W. VON OVEN, OF AURORA, ILLINOIS.

FILTE R-PRE SS.

, Specification of Letters Patent.

Patented Nov. 26, 1907.

Application filed April 26, 1907 Serial No. 370.490.

-;The object of my invention is to provide a novel construction, in matters of detail, of filter-press to the ends of increasing the efficiency of the press and reducing the liability to fracture of the filtering-frames under the pressure to which the are subjected in use, and to the further en of avoiding all neces sity of cutting holes in the filter-cloths for the series of filter-plates into the respective filter-chambers.

4 Referring to the accompanying drawings Figure l is a view in side elevation of a filterpress embodying my improvements; Fig. 2, a section taken at the line 2 on Fig. 1, viewed in the direction of the arrow and enlarged, with parts of the cell-structure broken away to disclose details; Fig. 3, a broken section through the feed-passage, taken at the line 3 on Fig. 2, viewed in-the direction of the arrow and enlarged; Fig. 4, a broken section through the re-wash assage, taken at the line 4 on Fig. 2, viewet in the direction of the arrow and enlarged; Fig. 5,-a section-taken at the line 5 on Fig. 6 and viewed in the direction of the arrow, showing the construction of the acking between joints of the feed-passage; ig. 6, a section taken at the line 6 on Fig. 5 and viewed in the direction of the arrow, showing the feed-port-containing rubher-gasket employed between framejoints in the feed-passage; Fig. 7, a section taken at the line 7 on Fig. 5 and viewed in the direction of the arrow, showing the manner of yieldingly fastening the aforesaid gasket in place, and Fig. 8, a broken section showing thesarue, taken at the'line Son Fig. 5 and Viewed in the direction of the arrow.

The sup orting frame-work of the press,

which is b0 ted to a base 9, (as a floor) consists of an end-frame 10,1preferably a casting, and an end-frame 11, a so preferably a casting, having integrally formed with it the stationary head 1 2 of the press. The movable p arts of the press, hereinafter described, are confined between "and reci rocably supported u on side-bars 13 extending'between and bolte to the sides ofthe frames 10 and 11. able head 14 is supported at rollers 15 project- The mnv- I ing from its sides on the bars 13, and also at flanges 16 projecting from its sides to bear against the tops of the supporting bars, this head being centrally engaged by a screw 17 working in a bearing in the frame 10 and carrying on its outer end a hand-wheel 1b.

The parts thus far described are common in lilter-pressds of the type to which my in vention relates, the features of novelty being contained in the chamber-forming frames interposed between the heads 12 and 14, all of which are constructed substantially alike, so that the following description of one will apply to each: The frame-rim 19 is a metal casting preferably of rectangular form, 'with its inner edges beveled and having a central flange 20 extending about them to afford on its opposite sides shoulders 21. Screens 22 and 23, of perforated or woven metal, fit in each frame, abutting against the opposite shoulders 21, to which they may be fastened at intervals. interposed between each pair of screens, and fitting the interior of the rim more or less-loosely, is an openwork mat 24, preferably of woven wire with a coarse mesh. A sheet 25 of filtering cloth is folded to hang over the upper edge of the frame and cover the faces of its two contained screens; and near its lower corner the frame-rim contains an outlet-port 26 pro vided with a-draw-oif faucet 27. On the horizontally opposite corner-portion of the rim is cast an ear 28 provided with a transverse opening 29 and containing in one side a curved recess 30, in which is confined a strip of packing 31, of rubber or other suitable material, of the preferred cross-sectional shape represented in Fig. 3, this packingstrip projecting beyond this surface of the ear and frame-rim. Incach side of the framerim adjacent to the ear thereon is )rovided an upright recess 32, of the shape il ustratcd in Fig. 6, involving a vertical back and similar oblique ends, in which fits one side of a gasket 33, of rubber or other suitable 'mate rial, of the general lozenge-shape represented to cause it to conform to and fit the recss 32, and containin an elongated opening 34, which is lined with a metal thimble 35 forming an inlet-port. Metal sockets 36, 36 project from the thimble beyond the outer edge of the gasket to confine the heads of screws 37 extending throughzthe bases of the sockets into the side of the frame and afford to the gasket slight movement longitudinally of the screw-shanks and thus lengthwise of the 38 containing a tubular opening 39 for the re-wash purpose of the press, and a port 40 leads from this passage to the interior of the frame. On each side of the frame-rim is a handle 41 by which to slide it on its bearings 16 upon the side-bars 13.

To. form the press illustrated in Fig. 1, frames are assembled to be supported at their flanges 16 between the bars 13 to adapt them to slide thereon and abut ilatwise one against the other, with gaskets 42 (Fig. 4) interposed between the cars 38 and let into recesses in the head 14 and alternate framerims. Before compressing the frames together, each has hung upon it its filtering cloth 25, the edges of which overlap the inner beveled rim-edges, to be clamped between frames in pressing them together by turning the screw 17 to advance the head 14 on. its bearings and force the frames ahead of it against the stationary head 12. l l ith the parts thus assembled, the openings 29 aline to form the feed-passage to the machine for the material to be filtered, and the openings 39 aline to form the inlet passage for the hot water used for the Ire-washing purpose, the supply of material to be filtered entering the passage 29 through a valve-controlledpipe 43 on the head -12, the filtrate discharging through the faucets 27; and a valved pipe 44, for supplying the re-wash water, leads to the passage 39 at one end thereof. With the frames thus assembled and pressed together, their opposing rim-sides meetwith watertight junction, which. is assisted b y the interposed cloth clamped between them and by the packing 42; while the packing strips 31 and gaskets 82 effectually seal the joints between the ears 28, the openings in which form the feed-passage 29, with a port 34 in each gasket leading centrally into the base of each filtering chamber formed by a pair of the frames and by the end frames with the heads, the widthof' the chamber being such as may be desired according to the transverse width of the rims. Thus each frame, including its perforated center-portion, constitutes a chamber-forming element.

In the use of the press, the material to be filtered, fed along the passage 29, enters through the different ports 34 into the respective chambers, from each of which the liquid passes through the clothiforming its opposite walls, and the filtrate, discharges through the faucets 27. Nhen the chambers become filled with cakes of the solid matter through them of the filtrate.

water or other liquid for the re-wash is in-- troduced by Way of the passage 39 and ports 40 into alternate chambers, for the usual purpose of taking up filtrate left. in them. The ports 40 are only provided for alternate filtering chambers, namely those of which the faucets are closed, and they lead through the rims directly between the screens of the respective frames, so that the re-wash Water may pass through the filtering-cloths in the direction opposite that of the passage It will-be observed that the construction of the frames, with the screens and interposed mats filling their rims, and the purpose of which is-to afford backing for the fil-' tering cloth, renders the interior'ofthe press practically one continuous filtering-chamber containing at intervalscloth-covered openwork partitions of a character so flexible as to adapt them to yield rather than breakunder excessive pressure. In the event, however, of the perforate center-portion forming the wall in any frame, being forced out of placd by excessive pressure in the machine, the resultant damage to the press is comparatively slight and may easily be-re aired.

The space formed by the'open-Wor matting permits the introduction between the filtering cloths of'a solid sheet of liquid. The

open-work screens. supporting filtering sur faces may be em loyedin the recessedframe typeoffiter-press and also in the mud-ring type wherein'the mud-ring de termines the thickness of the cake or filtering mass. Moreover, the screens between filtering cloths gitre-perfect freedom to the passage of the filtered-liquid to the outlet-cocks directly from all parts of the filter-chambers after passing through the filter-cloths; that is to say, theliquid is not required to follow any definedchannel, which may be overcrowded or choked, and thus tend to obstruct or retard the, discharge.

The described construction not only avoids all necessity of cutting holes in the filteringcloths, but enables the use to be dispensed with of clips, and the like, for fastening such openings tightly about port-o enings, and which tend to reduc'the area 0 filtering surface; and besides the cake which forms about such openings tends to. softness, While the present construction produces uniform density throughout the cake.

hurt I claim as new and desire to secure by Letters Patent is- 1. 111 a filter-press, the filter frames havinginlet-port's in the junctions between them and provided with ears containing openings forming av feed-passage common to said ports. I y

In a filter-press, a chamber-formmg eleside-of the press and containing openings 5O edges, screens abutting against said shoulopenings alining in the press to form the feedfrom said re-wash passage through the rims ment consisting of a frame comprising a rim and an open-work flexible center-portion within it, with filtering-cloth coverlng the frame-sides.

3. In a filter-press, a chamber-forming element consisting of a frame comprising a rim, screens with an inter osed open-work mat confined within the rim, and filtering-cloth" covering the frame-sides.

4. In a filter-press, a chamber-forming element consisting of a frame comprising a rim havinginwiardly bevel'ededges and a flange affording shoulders extending about its inner ders, and an open-work flexible mat interposed between the screens, and filtering-- cloth covering the frame-sides.

5. In a filter-press, the combination with a stationary head and a movable head, of interposed chamber-forming frames comprising rims with open-work flexible center-portions, ears projecting from said rims and Containing passage thereto, ports leading from said passage into the chambers between frames, and filtering-cloth covering the frame-sides.

6. In a filter-press, the combination with a stationary head and a movable head, of interposed chamber-forming frames comprising rims with open-work flexible center-portions, ears projecting from said rims at one side of the press and containing openings alining in the press to form the fecd-passage thereto, ports leading from said passage into the chambers between frames, filtering-cloth covering the frame-sides, ears pro ecting from said rims at said side and containing openings alining in the press to form the rewash passage thereto, with ports leading from said re-wash passage to the chambers, and draw-oii faucets on the rims at the opposite side of the press and communicating with said chambers.

7. In a filter-press, the combination with a stationary head and a movable head, of interposed chamber-forming frames comprising rims with open-work flexible center-portions, ears projecting from said rims at one alining in the press to form the feed-passage thereto, ports leading from said passage into the chambers betwe n frames, filtering-cloth covering the frame-sides, oars projecting from said rimsat said side and containing openings alining inthe. press to form the re- Wash passage. thereto, with ports leading site side of the press and communicating with said chambers.

8. In a filter-press, the combination with a stationary head and a movable head, of in terposed cloth-covered chamber-forming frames, ears projecting from said frames at one side of the press and containing openings aliningin the press to form the feed-passage thereto, and gaskets confined between said frames and containing metal-lined port forming openings leading to said chambers.

9. In a filter-press, the comblnation with a stationary head and a movable head, of inalining in the press to form the feed-passage thereto, outer pacldng-strjps confined between the ears, and inner gaskets confined between said frames and containing portforming openings leading to said .ehamber.

11. In a filter-press, the combination with a stationary head and a movable head, of interposed cloth-covered chamber-forming frames, cars projecting from said frames at one side of the press and containing openings alining in the pressto form the feed-passage thereto, similar recesses in the opposing sides of the frames, and gaskets containing ports leading to said chambers and shaped to conform to and fit said recesses.

12. In a filter-press, the combination with a stationary head-and a movable head of interposed cloth covered chamber-forming frames, ears projectin from said frames-at one side of the press to fornrthc feed-passage thereto, similar recesses 1n the opposing sldes of the frames, gaskets containing openings and shaped to conform to and-fit said -recesses, metal thimbles in' the gasketopen ings forming ports leading to the said cham- FREDERICK I VON OVEN.

of alternate frames to different chambers, I and draw-off faucets on the runs at the oppoi In presence of RALrrI A. SCIIAEFER,

J. Ii. LANDES. 

